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Category:   Application (Generic)  >   Microsoft .NET Vendors:   Microsoft
Microsoft .NET Lets Remote Users Deny Service and Local Users Bypass UMCI Policy
SecurityTracker Alert ID:  1040851
SecurityTracker URL:  http://securitytracker.com/id/1040851
CVE Reference:   CVE-2018-0765, CVE-2018-1039   (Links to External Site)
Date:  May 8 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.0 SP2, 3.5, 3.5.1, 4.5.2, 4.6; .NET Core 2.0
Description:   Two vulnerabilities were reported in Microsoft .NET. A remote user can cause denial of service conditions on the target system. A local user can bypass security restrictions.

A local user can run a specially crafted application to exploit an object instantiation flaw in .Net Framework and bypass Device Guard User Mode Code Integrity (UMCI) policy on the target system [CVE-2018-1039].

A remote user can send specially crafted requests to the target application to trigger an XML document processing flaw in .NET and .NET Core and cause denial of service conditions on the target .NET application [CVE-2018-0765].

James Forshaw of Google Project Zero reported one of vulnerability.

Impact:   A remote user can cause denial of service conditions.

A local user can bypass security controls on the target system.

Solution:   The vendor has issued a fix.

The Microsoft advisories are available at:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0765
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-1039

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-1039 (Links to External Site)
Cause:   Access control error, Not specified
Underlying OS:  Windows (2008), Windows (2012), Windows (2016), Windows (7), Windows (8), Windows (10)

Message History:   None.


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